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(11)

EP 2 875 673 A1

(12)

(43) Date of publication: 27.05.2015 Bulletin 2015/22 (21) Application number: 12881183.3 (22) Date of filing: 17.07.2012

(51) International Patent Classification (IPC):  H04W 36/04(2009.01) H04W 36/24(2009.01) H04W 36/02(2009.01) (86) International application number: PCT/IB2012/053647 (87) International publication number: WO 2014/013291 (23.01.2014 Gazette 2014/04)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME (71) Applicant: Nokia Corporation 02610 Espoo (FI)	(72) Inventors: UUSITALO, Mikko 00200 Helsinki (FI) LI, Zexian 02340 Espoo (FI) (74) Representative: Nokia Corporation  Intellectual Property Department Karakaari 7 02610 Espoo 02610 Espoo (FI)